include/openvpn-msg.h

   1 /*
   2  *  OpenVPN -- An application to securely tunnel IP networks
   3  *             over a single TCP/UDP port, with support for SSL/TLS-based
   4  *             session authentication and key exchange,
   5  *             packet encryption, packet authentication, and
   6  *             packet compression.
   7  *
   8  *  Copyright (C) 2013-2025 Heiko Hund <heiko.hund@sophos.com>
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License version 2
  12  *  as published by the Free Software Foundation.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License along
  20  *  with this program; if not, write to the Free Software Foundation, Inc.,
  21  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  22  */
  23
  24 #ifndef OPENVPN_MSG_H_
  25 #define OPENVPN_MSG_H_
  26
  27 #include <windef.h>
  28 #include <ws2tcpip.h>
  29
  30 typedef enum {
  31     msg_acknowledgement,
  32     msg_add_address,
  33     msg_del_address,
  34     msg_add_route,
  35     msg_del_route,
  36     msg_add_dns_cfg,
  37     msg_del_dns_cfg,
  38     msg_add_nrpt_cfg,
  39     msg_del_nrpt_cfg,
  40     msg_add_nbt_cfg,
  41     msg_del_nbt_cfg,
  42     msg_flush_neighbors,
  43     msg_add_wfp_block,
  44     msg_del_wfp_block,
  45     msg_register_dns,
  46     msg_enable_dhcp,
  47     deprecated_msg_register_ring_buffers,
  48     msg_set_mtu,
  49     msg_add_wins_cfg,
  50     msg_del_wins_cfg,
  51     msg_create_adapter
  52 } message_type_t;
  53
  54 typedef struct {
  55     message_type_t type;
  56     size_t size;
  57     int message_id;
  58 } message_header_t;
  59
  60 typedef union {
  61     struct in_addr ipv4;
  62     struct in6_addr ipv6;
  63 } inet_address_t;
  64
  65 typedef struct {
  66     int index;
  67     char name[256];
  68 } interface_t;
  69
  70 typedef enum {
  71     wfp_block_local = 1<<0,
  72     wfp_block_dns = 1<<1
  73 } wfp_block_flags_t;
  74
  75 typedef struct {
  76     message_header_t header;
  77     short family;
  78     inet_address_t address;
  79     int prefix_len;
  80     interface_t iface;
  81 } address_message_t;
  82
  83 typedef struct {
  84     message_header_t header;
  85     short family;
  86     inet_address_t prefix;
  87     int prefix_len;
  88     inet_address_t gateway;
  89     interface_t iface;
  90     int metric;
  91 } route_message_t;
  92
  93 typedef struct {
  94     message_header_t header;
  95     interface_t iface;
  96     char domains[512];
  97     short family;
  98     int addr_len;
  99     inet_address_t addr[4]; /* support up to 4 dns addresses */
 100 } dns_cfg_message_t;
 101
 102
 103 typedef enum {
 104     nrpt_dnssec
 105 } nrpt_flags_t;
 106
 107 #define NRPT_ADDR_NUM 8   /* Max. number of addresses */
 108 #define NRPT_ADDR_SIZE 48 /* Max. address strlen + some */
 109 typedef char nrpt_address_t[NRPT_ADDR_SIZE];
 110 typedef struct {
 111     message_header_t header;
 112     interface_t iface;
 113     nrpt_address_t addresses[NRPT_ADDR_NUM];
 114     char resolve_domains[512]; /* double \0 terminated */
 115     char search_domains[512];
 116     nrpt_flags_t flags;
 117 } nrpt_dns_cfg_message_t;
 118
 119 typedef struct {
 120     message_header_t header;
 121     interface_t iface;
 122     int addr_len;
 123     inet_address_t addr[4]; /* support up to 4 dns addresses */
 124 } wins_cfg_message_t;
 125
 126 typedef struct {
 127     message_header_t header;
 128     interface_t iface;
 129     int disable_nbt;
 130     int nbt_type;
 131     char scope_id[256];
 132     struct in_addr primary_nbns;
 133     struct in_addr secondary_nbns;
 134 } nbt_cfg_message_t;
 135
 136 /* TODO: NTP */
 137
 138 typedef struct {
 139     message_header_t header;
 140     short family;
 141     interface_t iface;
 142 } flush_neighbors_message_t;
 143
 144 typedef struct {
 145     message_header_t header;
 146     int error_number;
 147 } ack_message_t;
 148
 149 typedef struct {
 150     message_header_t header;
 151     wfp_block_flags_t flags;
 152     interface_t iface;
 153 } wfp_block_message_t;
 154
 155 typedef struct {
 156     message_header_t header;
 157     interface_t iface;
 158 } enable_dhcp_message_t;
 159
 160 typedef struct {
 161     message_header_t header;
 162     interface_t iface;
 163     short family;
 164     int mtu;
 165 } set_mtu_message_t;
 166
 167 typedef enum {
 168     ADAPTER_TYPE_DCO,
 169     ADAPTER_TYPE_TAP,
 170 } adapter_type_t;
 171
 172 typedef struct {
 173     message_header_t header;
 174     adapter_type_t adapter_type;
 175 } create_adapter_message_t;
 176
 177 #endif /* ifndef OPENVPN_MSG_H_ */